Enlightened the silly dolt! (4)
I believe the answer is:
told
'enlightened' is the definition.
The answer and definition can be both related to thinking as well as being past participle verbs.
Perhaps there's a link between them I don't understand?
'silly dolt' is the wordplay.
'silly' indicates anagramming the letters.
'dolt' is an anagram of 'TOLD'.
'the' is the link.
Can you help me to learn more?
(Other definitions for told that I've seen before include "instructed" , "Assured" , "Informed; narrated" , "Made an impact" , "Related (a story)" .)